Base16 encoding: 001A5B

producer address:

The ethernet addresses starting with 00-1A-5B are owned by the vendor Netcare Service Co., Ltd. in 5-13-16 Shimizu, Asahi-Ku Osaka 535-0021 Japan. One can find troubleshooting information for the hardware on the manufacturer webpage http://www.netcare.co.za/.
This registered array of 1 blocks is able to address max. 16.777.216 devices.